Lusebrink, I; Burkhardt, D; Gedig, T; Dettner, K; Seifert, K; Mosandl, A: Intrageneric differences in the four stereoisomers of stenusine in the rove beetles genus, Stenus (Coleoptera, Staphylinidae), Naturwissenschaften, 94, 143-147 (2006), doi:DOI 10.1007/s00114-006-0172-4 | |
Abstract: Most species of the rove beetle genus Stenus employ the spreading alkaloid stenusine as an escape mechanism on water surfaces. In the case of danger, they emit stenusine from their pygidial glands, and it propels them over the water very quickly. Stenusine is a chiral molecule with four stereoisomers: (2′R,3R)-, (2′S,3R)-, (2′S,3S)-, and (2′R,3S)-stenusine. The percentile ratio of these four isomers is only known for the most common species of the genus: Stenus comma. With the intention of determining the stereoisomer ratios of five additional species from the two subgenera, Stenus and Hypostenus, we used GC/mass spectrometry measurements with a chiral phase. The results showed that the ratio differs among the genus. These findings can be a basis for chemotaxonomy. It is also possible that the biological function of stenusine, e.g., as antibiotic or fungicide, varies with changing stereoisomer composition. |
Antrittsvorlesung: |
---|
Mi. 22.05.2024 Funktionelle Pilzökologie: Diversität und Prozesse auf unterschiedlichen Skalen |
BayCEER-Kolloquium: |
Do. 06.06.2024 Tracking plant diversity dynamics on islands over thousands of years |
Mo. 10.06.2024 Arsenic biogeochemistry from paddy soil to rice grain |
Ökologisch-Botanischer Garten: |
So. 19.05.2024 aktuell Führung | "Den ÖBG Kennenlernen: Allgemeine Gartenführung" |
Mi. 29.05.2024 Führung | "Grüne Apotheke: Heilpflanzen" |